edit: I just searched on Google images for Cipka, and it shows images of vaginas. Wikipedia said 'Paška čipka, a type of lacework from town Pag on the island Pag, requires a needle, thread and backing which is a round or square hard stuffed pillow.'
You where insulted, now you can give them the same research to do with "krijg ff lekker de kanker", a phrase I hear all too often from my other half when i'm being a "Leniwa Cipka"... [nobody does swearing quite like the Dutch!] (if I could spell this right i'd suggest "kutkankerlekkerwhoren" which means i'm really in a hella lot of trouble).